The relationship can be developed through mutual need. For example, if the human is lost in the dinosaur's territory, the T - Rex could initially see the human as prey but then realize the human has some unique skills, like making fire or using tools. This could lead to a truce. Or if the T - Rex is injured, the human could use their medical knowledge (assuming some sort of knowledge transfer in the story) to help the T - Rex, and in return, the T - Rex protects the human from other threats.
A T - Rex short story could be like this. There was a young T - Rex who was always curious. He wandered away from his family's hunting ground. He came across a strange shiny object. It was a piece of a meteorite. The young T - Rex didn't know what it was but was fascinated. While he was examining it, an older and wiser T - Rex came by and showed him that it was not food. So the young T - Rex learned something new that day.
One common theme is the clash of different worlds. Since a T Rex is from a very different concept compared to the RWBY universe, stories often explore how the two coexist or conflict. For example, in many fanfics, the T Rex's primitive nature contrasts with the more advanced society in RWBY.
The theme of adaptation could also be present. How does a T - Rex adapt to a relationship that involves more than just basic survival instincts? In the context of lemon fanfiction, this could mean adapting to emotional and physical closeness with another being. This might involve the T - Rex learning new behaviors or ways of interacting that are foreign to its normal existence in the wild.
It could be about a T - Rex in a prehistoric world where dinosaurs have their own unique society with different sexual orientations. Maybe it would explore the challenges and acceptance within that dinosaur community for a gay T - Rex.
The plot could be about a T - Rex's hunt for food. For example, the T - Rex spots a large herbivore, chases it through the jungle, and finally catches it after a long pursuit.
I'm not sure specifically which 'Taken by the T - Rex' story you are referring to. There could be various fictional stories with this title. It might be about a person or a group being captured or chased by a Tyrannosaurus Rex in a prehistoric setting, perhaps in a lost world or a time - travel adventure.
The setting makes it unique. A t rex romance novel is set in a prehistoric world which is very different from typical romance settings. Instead of modern cities or idyllic countryside, it has jungles filled with dinosaurs.